If it's not there, then check your functions.php file for something like:wp_deregister_script('jquery');
It should be part of a function, and the function should be called using a hook like so:add_action("wp_enqueue_scripts", "my_jquery_enqueue", 11);
comment out the add_action part.

The quality of IE never seises to amaze. There seems to be an issue with using spaces and dashes in a new window. Yay for IE. We have fixed it on your install, please test it and get back to us. If it fixes the issue, we will issue an official update.

Thanks, and sorry for anyone out there that is forced to use IE against there own free will.